John was piloting a plane behind a car but was never able to overtake it. Why?

I am green and found in the forest and have needles instead of leaves. What am I?
Hint 1: It can be used for Christmas decorations.
Hint 2: I have a strong, scent that is used in air fresheners.

A King wants to send the diamond ring to his girlfriend securely. He got multiple locks and their corresponding keys. His girlfriend does not have any keys to these locks and if he sends the key without a lock, the key can be copied in the way. How can King send the ring to his girlfriend securely?

The two towns are exactly 100 km apart. John leaves City A driving at 30 km/hr and Jacob leaves City B half an hour later driving at 60 km/hr. Who will be closer to City A when they meet?

Two batsman each on 94 runs. Seven runs needed to win in last 3 balls. Both make 100*. How?

If you had a pizza with crust thickness 'a' and radius 'z', what's the volume of the pizza?

What has one letter and starts with an E?

Replace the question mark with the number below given a simple math problem.

What do you see in the image below

There’s a girl who has a large family. She has an equal amount of brothers and sisters, but each brother only has half as many brothers and sisters. What’s the correct amount of brothers and sisters?